u.s. police routinely track cell phone users

al jazeera

“I am surprised agents are getting information from all the calls to a particular cellphone tower,” Friedwald, a law professor at the University of San Francisco, told Al Jazeera. “I think that is one of the biggest intrusions.”

Cellphones register their location with phone networks several times each minute. This function cannot be turned off when the phone is getting a wireless signal. Police ask phone companies to provide them with data on the phone communicating with the tower, allowing police to monitor the movements of cellphone users, which includes virtually everyone.

In Tucson Arizona, for example, police sometimes obtain cellphone numbers for all the phones in a particular area, allowing innocent people to have their personal information and movements potentially scrutinised by authorities.

along with god knows who else.


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